Theresa Victory Gloria, author
2014
UI - Skripsi (Membership)
Keoghan, Phil, author
Bhuana Ilmu Populer, 2004
Buku Teks
Jack O'Gorman, editor
[American Management Association, ], 2008
eBooks
Shaw, Gareth, author
Leicester University Press, 1988
Buku Referensi
Titis Hutami, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 1996
UI - Skripsi (Membership)